Personal history of immunosuppression therapy

This code indicates a patient's past medical history of having received treatment that intentionally suppresses or reduces the activity of their immune system. This could be due to organ transplantation, autoimmune diseases, or certain cancer treatments, and implies a continued need for monitoring related to their immunocompromised status.

Use this code when documenting a patient's history of immunosuppressive therapy, even if they are no longer actively receiving the treatment. This is crucial for understanding potential long-term effects, increased infection risk, or the need for specific prophylactic measures. It is often used in conjunction with codes for the underlying condition that necessitated the immunosuppression.

• Do not use for current immunosuppression therapy; instead, code the current drug use (e.g., Z79.899 for other long-term (current) drug therapy).
• Distinguish carefully from Z92.24 (personal history of steroid therapy), as not all steroid therapy is for immunosuppression.
• Always code the primary reason for the immunosuppression therapy (e.g., organ transplant status, autoimmune disease) in addition to this history code.